Samuel buschlen and louis sees



(-Model.)

S. BU$GHLEN 82; L. SEES. Latqhes.

Patented Aug. 1,1880.

mw w n N. PETERS. PHOTO UNITED STATES PATENT OFFICE.

SAMUEL BUSOHLEN AND LOUIS SEES, OF PORT ELGIN, ONTARIO, CANADA.

LATC H SPECIFICATION forming part of Letters Patent No. 230,861, dated August 10, 1880. 1 Application filed March 25,1880. (ModeL) To all whom it may concern Be it known that. we, SAMUEL BUSCHLEN and LOUIS SEES, both of Port Elgin, in the county of Bruce, in the Province of Ontario, Canada, have jointly invented certain new and useful Improvements on Lock-Latches; and we do hereby declare that the following is a full, clear, and exact description of the same.

The object of our invention is to lock the drop-bar of a thumb-latch from the inside or outside ofa door by means of a key; and our invenlion relates to .the construction and adaptation of the several parts to each other, whereby the same is effected; and it consists of a base-plate, to be fastened to a door having a key-hole to a locking-bolt in a latch-bar which is formed at one end with a hollow hub having a key-hole, and held operatively to the plate by an annular cap. A stop-block on the baseplate coincides with a transverse groove in the latch-bar, -so that when the bolt is projected across the groove by a key the latch-bar is prevented from rising out of its catch on the door-frame, and will not be sub- 2 5 ject to the ordinary lifting action of the thumbpiece passing through the base-plate.

Figure l is a perspective view of our improved latch. Fig. 2 is a perspective view of the latch-bar detached. Fig. 3 is a plan of the same inverted. Fig. 4 is a perspective view of the collar, and Fig. 5 a plan of the baseplate of the latch by which it is secured to a door.

A is the base-plate of the latch, to be secured to a door by screws or other fastening passing through holes a therein. 1) is a keyhole near the inner extremity of the plate. 0 is a slot to receive the ordinary thumb-piece of a latch; and d, a stop-block near the outer end of the plate, for the purpose hereinafter described.

B is the drop-bar of the latch, the inner extremity enlarged and formed with projecting hub e, which is chambered inside, and has a key-hole, h, to admit a key to the chamber.

The drop-bar B is recessed from the hubchamber to a transverse slot, f, near its opposite end, and said recess is occupied by a bolt, 0, shooting into the slotf, when projected, by turning a key entering the key-hole. The bolt is provided with a projection, g, which enters corresponding recesses in the bar, to prevent the movement of the bolt until lifted by the key.

h is a flat spring acting on the bolt to keep the projection g in engagement with the locking-recess i in the bar when the boltis shot or drawn back.

1) is a collar or cap confining the hub 6, but allowing the bar B to have pivotal motion therein to rise and fall by the action ot'a thumbpiece, E, which passes through the door, and which piece works in the ordinary manner.

F is a guide or keeper to keep the bar close to the plate A.

Gris the catch on the door-frame, into which the bar B latches in the ordinary manner.

Stop-block d is fixed to or cast with plate A and coincides with groove f across latchbar B, through which groove block d slides when the latch-bar is lifted.

Bolt 0, when shot into the groove, prevents the passage of" block d through the groove, so that when the latch-bar is in engagement with catch Gr bolt 0 will be in lateral contact with the end of the fixed block d, and prevent the latch-bar being lifted out of engagement with catch Gr, until, by the use of the key, the bolt 0 is drawn out of the groove f from engage ment with block (I, to allow the bar B to rise unobstructed by the block d.

The latch is capable of application [0 either side of a door. The key-holein one case would be upside down, the stop (I being centrally placed to allow the bar B to be locked by contact of the bolt with either end of the stop.

If desired, the thumb piece may be dispensed with and a knob employed to lift the latch-bar B.

WVe claim as our invention- 1. The plate A, having key-hole 1), slot 0, and stop-block d, in combination with a latchbar, B, provided with a longitudinal lockingbolt, 0, and slotf, as set forth.

2. The latch-bar B, formed with a hub-projection, 0, having key-hole h and slot f, and havingin a longitudinal recess a bolt, C, shooting into saidslot f, in combination with plate A, haw'ing stop d, as set forth, for locking the latch-bar, as described.

3. The combination of cap D, latch-bar B, having hub e, and plate A, having key-hole entering the hub, as set forth.

SAMUEL BUSOHLEN. LOUIS SEES. Witnesses:

M. F. EBY, JACOB BOOK.

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